Addition
4+2=
6
10-2
8
How many sides does a square have?
4
5+4
9
7-6
1
How many sides does a triangle have?
3
7+7=
14
13-6
7
How many sides does a rectangle have?
4
10+10
20
14-14
0
How many sides does a circle have?
0
18+12
30
25-12
13
How many sides does an octagon have?
8